Sand-point for well-drilling.



E. MASTER.

SAND POINT FOR WELL DRILUNG.

APPLICATION FILED APR.30| 191-7.

Patented Dec. 17, 1918.

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nzowenn antenna, or NEOSHO, SASKATCHEWAN, chicane.

SAND-P011? T FOB WELL-DRILLING.

neenoo.

Specification of Letters Patent.

Patented Deeo ll't, 1 3918,.

Application filed April 30, 1917. Serial No. 165,494.

To all whom it may concern:

Be it known that I, EDWARD MASTER, a

subject of the King of England, residing at wherein the same is prevented from clogging when in use and also from breaking or becoming damaged when driven into the earth or withdrawn therefrom and in event of damage can be readily repaired expeditiously, thereby eliminating the necessity of an entirely new point.

Another object of the invention is the provision of a point of this character wherein the construction thereof is novel in form to assure longevity in the use thereof and that will withstand the work without possibility of clogging.

A further object of the invention is the provision of a point of this character which is extremely simple in construction, thoroughly reliable and efficient in its purpose, strong, durable and inexpensive in manufacture.

Uther objects will be in part obvious and in parthereinafter set forth.

The invention accordingly consists in the features of construction, combination of elements and arran ements of parts which will be exemplified in the construction hereinafter described, and the scope of the application of which will be indicated in the ap-.

pended claim.

In the drawings:

Figure It is a side elevation of a point constructed in accordance with the invention;

Fig. 2 is a vertical lon itudinal sectional view thereof;

Fig 8 is a perspective View of one of the guard bars; and

Fig. i is an enlarged longitudinal transverse sectional view.

Similar reference characters indicate corviews of the drawing.

Referring to the drawing in detail, A designates generally the tube or cylinder and B the piercing tip or plug of the sand point which is integral with or mounted in the tube or cylinder at one end thereof, the mounting being effected in any suitable manner, and this tube or cylinder B is formed with a series of rows of perforations or holes C, while exteriorly of and concentrically disposed with respect to said tube or cylinder A are spaced parallel bars 5, each being preferably made from soft steel and is of tapered formation in cross section throughout a major portion of its length, having offset anchoring terminals 6 which engage in suitable openings 7 formed in the said tube or cylinder A for the mounting of the bar thereon longitudinally of the same.

Formed at intervals on the bar at one side are lugs or ears 8, while in the opposite side are recesses 8. for the lugs or ears so that the bars will be held interlocked with each other and spaced apart. In suitable grooves formed in the outer faces of the barsand lugs or ears are engaged retaining wires 9, the ends of each being spliced at 10 with respect to a bar 11 which is identical to the bars 5 with the exception that the same is slightly wider than said bars5, and in this manner the companion bars of the series are held securely in their separated relation to each other about the'tube or cylinder B so as to prevent the clogging of the point in the use thereof for well drilling.

The bars 5 provide therebetween spaces which are tapered from the outside inwardly, and these bars prevent the possibility of the clogging of the point when working in coarse or fine sand. The point is capable of being driven and there is no possibility of the clogging thereof when in use or the breaking or tearing of the same whleln being driven or removed in drilling a we From the foregoing description, taken in connection with the accompanying draw ing, the construction and operation of the herein described sand point will be readily apparent and, therefore, a more extended explanation has been omitted.

Having thus described my invention, 1 claim:

A point of the. character described 'com prising a perforated tube having a pointed trip, a plurality of bars concentrically of the tube, each bar being tapered in cross section for a major portion ofits length, anchor- 5 ing terminals on the bars and engaged in the tube, ears at one longer edge of each bar and adapted for interlocking engagement with an adjacent bar, and retaining means surroundin the bars at the points of the ears and lying flush with the outer faces 10 of said bars.

In testimony whereof I affix my signature.

EDWARD MASTER. 

